ifup-local on bridge members on CentOS

I run a bunch of CentOS 6 physical servers as QEMU virtualization devices. These hosts have two NICs, one for management and one for virtual machine bridges.

When you use Linux for virtualization, it’s important to increase the amount of memory for network transmit and receive buffers. You also need to disable GSO and TSO, to improve performance and to avoid gigabytes of kernel error messages every day. You can do this with ethtool(8). First, let’s check the existing ring sizes.

# ethtool -g et...